Murkowski is the third GOP senator viewed as a potential swing vote to break with the president after the rally. The comments come as Republican leadership hopes to vote on Kavanaugh's nomination by the end of the week.

The three GOP senators have the power to decide if Kavanaugh gets confirmed. Republicans hold 51 seats in the Senate, and he remains short of the simple majority needed to be seated on the Supreme Court.

Republicans can only afford to lose one GOP senator before they need to lean on Democrats to help confirm Kavanaugh.

Flake has said that, absent new information the FBI, he expects to vote "yes." Collins and Murkowski have not tilted their hand on how they will vote but are under extreme pressure from both sides.